Re: Determining Correct Scope Base Angle By Robert H. Thompson
Couple of points to remember.
If you shim the rear base much more than 20 MOA then you may need longer rear base screws. You have to make sure they are not too long and hit the bolt. If you try to use too short of screws you risk stripping the threads when they pull loose.
Before you shim a scope check the receiver to see if it is level to begin with. Many are not square and you will begin with some positive or negative angle even with a flat base. This must be accounted for in determining the amount of shim needed.
The Smokin Fur Rifle Club